Question

A bacterial culture growing in a medium containing 15NH,Cl is switched to a medium containing 14NH,Cl for
three generations (resulting into eight fold increase in its population), what is the molar ratio of hybrid DNA
(15N - 14N) to light DNA (14N- 14N) at this point?
a. 2/6 or 0.33
b. 3/5 or 0.60
C. 4/4 or 1.00
d. 1/7 or 0.14
​

Answer 1

Answer:

A. 2/6 or 0.33

Explanation:

In count of 8, only 2 have hybrid ones. Rest six have light ones.

During further multiplication of this colony, no matter how many increase might be there, only 2 out of all will have hybrid set.